Motorola 8991142 Service Manual
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OLA 3TMR
IOTORS
8991142
-
MOTOROLA
GENERAL INFORMATION
no-charge basis to the customer. If
you are not already authorized as a
Motorola Auto Radio Service Station
and you are interested in handling
this service, please contact your
Motorola Distributor for complete
details.
TYPE
Automotive type all-transistor
superhetrodyne
AM
radio for stand-
ard broadcast reception; operates
from 12 volt negative ground system.
Designed for custom installation in
the 1963 Rambler. This receiver
contains a plated chassis board,
5
transistors and 2 diodes. Some
installations use a rear speaker and
control (AK-401
-
American Motors
Part
#
8991 148).
TO SET PUSHBUTTONS
Allow receiver to warm up for
fifteen minutes. Pull up on push
buttons to unlock. Push down firmly
on pushbuttons to lock after station
has been selected.
All B- connections are carried
through the placir chassis in multi-
ple paths to the
B-
side. This in-
SERVICE STAT1
ON
SERVICE NOTES
PROCEDURE
1.
RADIO POLARITY
-
WHEN SER-
VICING THIS RECEIVER, THE
"A"
sures a good low resistance return
path. Two separate and independent
paths are provided to ground.
1. A defective in-warranty radio
must be accompanied by the Custom-
er's Warranty Policy Tag. This tag
must be properly filled in by the
American Motors dealer at the time
of radio purchase. Accept as war-
ranty repairs only those radios with-
in the 12-month warranty period.
The removal or re-installation of
this receiver is customarily per-
formed by the American Motors
dealer and is not covered by this
warranty. Also, the removal of
motor noise, tire static, electrical
interference, faulty installations,
and aerial repairs are not consider-
ed as warranty repairs; and there-
fore, expenses related to such
ser-
.vices should' be handled by the car
dealer.
LEAD MUST BE CONNECTED TO
THE POSITIVE SIDE OF POWER
SOURCE. IF CONNECTED OTHER-
WISE, RECEIVER .WILL NOT OP-
ERATE AND DAMAGE TO COM-
PONENTS MAY RESULT.
4. TO SERVICE PLATED CHASSIS
BOARD
-
To remove the plated
chassis from the radio housing,
un-
solder the plated chassis ground
wire from chassis housing. Release
the chassis board locking spring
and carefully lift chassis board out
of housing. Position the chassis
board vertically with respect to
radio housing for servicing.
2.
POWER SUPPLY REQUIRE-
MENTS
-
It is preferable to use a
storage battery (without a battery
charger) in place of a battery elim-
inator. If a battery eliminator is
used, it must be well filtered and
regulated.
After servicing is performed, re-
install plated chassis board. Make
certain chassis board is properly
placed in the grooves of the chassis
retaining brackets and locked in
position with the chassis
boardlock-
ing spring. Re- solder ground lead.
3. PLATED CHASSIS BOARD DES-
CRIPTION
-
Motorola' s placir
chassis has plating on both sides
o_f
the chassis board. The exposed side
contains the actual circuit connec-
tions while the plating on the com-
ponent side of the chassis board
provides a convenient chassis B-
return for components and circuit
wiring. Plating on the component.
side also provides shielding between
the top and bottom of the unit
similar to a metal chassis
whichin-
corporates hand wiring.
5.
TRANSISTOR REPLACEMENT
-
When replacing a transistor (other
2.
Fill
in Motorola Auto Radio War-
ranty Labor Claim, Part Number
54P480 884 and mail white and green
copies to: Service Department
(Warranty Group), Motorola Auto-
motive Products, Inc.. 9401 West
Grand Avenue. Franklin Park,
Ill.
-
than the power transistor), grasp
the transistor leads (between tran-
sistor body and plated chassis board)
with a pair of long nose pliers to
prevent excessive heating of tran-
sistor body during soldering opera-
tion.
3.
The yellow copy of the Motorola
Auto Radio Warranty Labor Claim
q
is to be retained by the authorized
service .station for his files.
REAR
FRONT
S
PKR
811
4. Defective parts for warranty re-
pairs made on this model are to be
sent to your Motorola Distributor
for free replacement, supported with
the defective parts return tag or
a
form which you are now using.
5.
Only those service shops author-
ized by their Motorola Distributor
can perform warranty repairs on a
AMERICAN MOTORS PART NO.
8991148
REAR SPEA ;RAM XER WIR
s.........
ING DIA(
8
. . .
. . . . .
.
MO'TOROIA
INC.
9401 WEST GRAND AVENLE;, rdANKLlN PARK, ILLINOIS
PART NO.
68P40056627
PR
I
CENTS
COPYRIGHT
1962
BY MOTOROLA INC. PRINTED IN
U